public bool doStep()
{
bool somethingMoved = false;
// handle input from ring
if (_in.Out != null)
{
Flit f = _in.Out;
_in.Out = null;
somethingMoved = true;
if (f.packet.dest.ID == _router.coord.ID)
{
_credits++;
_router.acceptFlit(f);
}
else
{
_buf.Enqueue(f);
Simulator.stats.bufrings_nic_enqueue.Add();
}
}
// handle through traffic
if (_buf.Count > 0)
{
Flit f = _buf.Peek();
if (_downstream.getCredit(f, this, 0))
{
_buf.Dequeue();
_credits++;
_out.In = f;
Simulator.stats.bufrings_nic_dequeue.Add();
somethingMoved = true;
}
}
// handle injections
if (_out.In == null && _inject != null)
{
if (_downstream.getCredit(_inject, this, 2))
{
_out.In = _inject;
_router.statsIJ(_inject);
_inject = null;
Simulator.stats.bufrings_nic_inject.Add();
somethingMoved = true;
}
}
if (_inject != null)
{
Simulator.stats.bufrings_nic_starve.Add();
}
if (_out.In != null)
{
Simulator.stats.bufrings_link_traverse[1].Add();
}
Simulator.stats.bufrings_nic_occupancy.Add(_buf.Count);
return(somethingMoved);
}
